> remove EXFAT_SB_DIRTY flag and related codes. > > This flag is set/reset in exfat_put_super()/exfat_sync_fs() to avoid sync_blockdev(). > However ... > - exfat_put_super(): > Before calling this, the VFS has already called sync_filesystem(), so sync is never performed here. > - exfat_sync_fs(): > After calling this, the VFS calls sync_blockdev(), so, it is meaningless to check EXFAT_SB_DIRTY or to > bypass sync_blockdev() here. > Not only that, but in some cases can't clear VOL_DIRTY. > ex: > VOL_DIRTY is set when rmdir starts, but when non-empty-dir is detected, return error without setting > EXFAT_SB_DIRTY. > If performe 'sync' in this state, VOL_DIRTY will not be cleared. There is still a problem if system reboot or device is unplugged when sync is not called yet. I will remove this mention in the patch.
